This device transforms your PC into a powerful controller that you can use to program and automate machines, circuits, or just about anything you can imagine. Its flexible 29 I/O ports that you can configure to work ( bit by bit or in groups) as inputs or outputs makes it adaptable to a wide array of applications . Control of stepping motor system is unbelievably easy, thanks to its built-in Pulse Generator function. It even has encoder switch input functions, counting inputs, and port capture register. It is Visual Basic friendly, and more!
29 I/O Serial I/O PC Automation: [Link] - [Via]
The circuit is very simple. The RGB LED is hooked up to the PWM outputs on PORTB1 , PORTB2 and PORTB3 of the ATMega8. There is also a resistor between the LED and the ATmega8 to limit the current to 20mA. There is also a link to the datasheet of the RGB LED that is used in this project.
The code for the fading LED is written in assembler with the AVR Studio 4. In this example the LEDs will fade in and out one by one. The PWM timers of the ATMega8 are used to let the LED’s fade in and out. To use the PWM timers you first need to initialize the timers at the begin of the program code. The speed of the fading in and out can be changed with changing the clock speed of the ATM8.You can copy and paste the textfile into the AVR Studio 4.
Fading RGB LED with PWM Controll: [Link]
The “Birth Clock” is a fragile glass object containing a digital clock that is not working; it is designed to help you to come to a decision when you’re stuck at a specific point in life. Smash the glass, and the clock will start to work, leaving you with the broken object as a reminder of your dramatic decision. Leave the object as it is, and you remain out of time, having the beautiful object as a reminder of your resistance to change. What would you do?
Electronic Ambiguity: [Link]
Jason writes:This entry shows the configuration I used to make a NMB (Minebea Electronics Co.) PM35L-048, 24VDC, 9.4 Ohm unipolar stepper motor work. I salvaged several of these motors from some Xerox inkjet printers. The motors were labeled well and I found manufacture specifications on-line. I was not able to find a wire diagram so I defaulted to making a truth table as I had done for unipolar steppermotors. Most steppers with 4 wires can usually be identified as bipolar stepper motors, which can be driven with a dual H-bridge IC such as the SN754410 by Texas Instruments.
Driving a Bipolar Stepper Motor: [Link] - [Via]
This project is build around one of new Microchip PIC18F2455/2550 8-bit microprocessor with USB support. The PIC18F2455 USB core is V1.1 and V2.0 compliant and operates at 1.5 Mb/sec and 12Mb/sec speeds respectively. The microprocessor has 2048 bytes of RAM and 24K of Flash program memory, which is plenty for implementing the OBD2 controller functionality using high-level C programming language.
USB OBD2 Adapter Based on PIC18F2455: [Link]
